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waveOutWrite (Compact 2013)

3/26/2014

This function sends a data block to the specified waveform output device.

Syntax

MMRESULT waveOutWrite(
  HWAVEOUT hwo,
  LPWAVEHDR pwh,
  UINT cbwh
); 

Parameters

  • hwo
    Handle to the waveform-audio output device.
  • pwh
    Pointer to a WAVEHDR structure containing information about the data block.
  • cbwh
    Size, in bytes, of the WAVEHDR structure.

Return Value

One of the values described in the following table is returned.

Value

Description

MMSYSERR_NOERROR

Success.

MMSYSERR_INVALHANDLE

Specified device handle is invalid.

MMSYSERR_NODRIVER

No device driver is present.

MMSYSERR_NOMEM

Unable to allocate or lock memory.

WAVERR_UNPREPARED

Data block pointed to by the pwh parameter has not been prepared.

WAVERR_BADFORMAT

Unsupported wave format.

WAVERR_STILLPLAYING

The waveform output device is still playing some other data.

WAVERR_UNPREPARED

The wave header is not prepared.

WAVERR_SYNC

The waveform output device is synchronous.

Remarks

When the buffer is finished, the WHDR_DONE bit is set in the dwFlags member of the WAVEHDR structure.

The buffer must be prepared with the waveOutPrepareHeader function before it is passed to waveOutWrite. Unless the device is paused by calling the waveOutPause function, playback begins when the first data block is sent to the device.

Requirements

Header

mmsystem.h

Library

coredll.lib

See Also

Reference

Waveform Audio Functions